JPS5917655Y2 - typewriter ribbon device - Google Patents

Description

[Detailed description of the invention] This invention relates to a ribbon device for a typewriter, and in particular, when replacing a printing ribbon with a new one, the ribbon guide is operated by operating a manual operation member operatively connected to the ribbon guide. This invention relates to an improvement of a ribbon device in which the upper part of the ribbon holding arm of the ribbon guide is rotated in a direction away from the surface of the ribbon to open the upper part of the ribbon path of the ribbon guide.

The ribbon guide, which moves up and down between a rest position and a printing position each time a printing operation is performed, is provided with a ribbon passage through which the printing ribbon is inserted, so that the printing ribbon quickly follows the movement of the nobon guide.

However, since this ribbon path is usually shaped like a slit that is closed at the top and bottom, in conventional typewriters, when replacing the ribbon with a new one, the ribbon must be removed from the ribbon path or inserted into the ribbon path. It is troublesome to insert the ribbon, gets one's hands dirty, and is difficult to operate when replacing the ribbon because the ribbon guide is at a lower rest position.

For this reason, various devices have been devised in the past to facilitate ribbon replacement, such as the device shown in FIG. 1, which was previously filed by the applicant of the present invention.

That is, in FIG. 1, the swing lever 1 is pivotally supported by the machine frame at its right base, and the ribbon guide 2 is formed at its left end.

This ribbon guide 2 includes a guide main body 3 integrated with the swing lever 1, and a presser member 5 that is pivotally supported on the guide main body 3 and forms a ribbon passage 4 whose upper part can be opened in cooperation with the guide main body. It is configured.

This ribbon guide 2 is constructed by tilting the manual operation lever 6 from the inoperative position shown by the dashed line to the operating position shown by the solid line, and by lifting the lower edge of the swinging lever 1 with the shaft member 7 on the lever 6, the ribbon guide 2 is moved from the rest position to the ribbon exchange position above, and at the same time presses the protrusion 5a of the presser member 5 via the operating lever 8 connected to the manual operation lever 6 to rotate the presser member 5 and move it upward into the ribbon passage 4. There was something to open it.

However, in this type of device, since the ribbon guide 2 also moves upward at the same time as the presser member 5 is rotated by the manual operation lever 6, the color change mechanism is particularly set to the "stencil" or "red" position. , if the ribbon guide 2 can rise to the highest printing position with small resistance, the timing of the upward movement of the ribbon guide 2 is too early.
In some cases, the upper part of the ribbon passage 4 could not be opened.

This invention aims to eliminate such drawbacks and provide a ribbon device that operates reliably, and one embodiment of this invention will be described in detail below with reference to the drawings.

In FIG. 2, reference numeral 10 denotes a support plate fixed to a machine frame (not shown), and a base end portion of a swing lever 11 is rotatably supported on this support plate 10 by a shaft 12.

The swinging lever 11 can swing between a pair of upper and lower stoppers 13 and 14 formed on the support plate 10, and a spring 15 applied between the swinging lever 11 and the support plate 10 keeps the swinging lever 11 downward. The edge is held in a rest position in abutment with the lower stopper 14.

Further, a bent piece 16 is formed at the lower right portion of the pivot portion of the swing lever 11 and is bent horizontally forward.

Reference numeral 17 is an actuating member, which has a circular hole 1 bored in the center of the body.
8 is fitted into the bending piece 16, this actuating member 17 is made swingable on the swing lever 11 about the bending piece 16.

The actuating member 17 is fixed onto the swinging lever 11 by a step bolt 20 through a slotted hole 19 formed in the upper right corner, and therefore swings within the range of the slotted hole 19 around the bent piece 16. The attachment of the actuating member 17 to the lever 11 can be adjusted in position.

The actuating member 17 extends to the left of the shaft 12, and has a groove 21 opened on the left side formed at its left end.

A cam portion 21a is formed at the entrance opening of the groove portion 21, and the groove width becomes wider toward the outside.

The tip of the swinging lever 11 extending to the left reaches the center of the typewriter in the left-right direction, and a second
As shown in FIGS. 4 to 4, a guide main body 24 includes a pair of arms 23 extending in the vertical direction and forming a space 22 through which a printing element 54 such as a type bar with typefaces 53 passes.
is formed.

Each of these arms 23 has a pair of bent pieces 25 formed above and below the side edge on the space 22 side.

Further, a horizontal bent step 26 is formed at the lower base of the arm 23, and a horizontal bent step 26 is formed on the side of the space 22 adjacent to the bent step 26, and extends upward at a predetermined angle with the arm 23. A pair of stoppers 27 are formed.

Further, the guide main body 24 has a downwardly extending hanging portion 28, and a horizontally elongated hole 29 is formed in the hanging portion 28.

Reference numeral 30 denotes a substantially U-shaped holding member that partially overlaps with the guide main body 24, and together with the guide main body 24 constitutes a nobon guide 31.

This pressing member 30 has guide bodies 2 on the left and right sides of the space 22.
A pair of presser arms 32 are formed along each arm 23 of No. 4.

A notch step portion 33 is formed at the lower base of each of the presser arms 32, and this notch step portion 33 forms the guide main body 24.
It is arranged so as to be placed on the folded step portion 26 of.

Therefore, the presser member 30 rotates around the notch stepped portion 33, as shown in FIGS. 2 and 3, and has a closed position where the presser arm 32 approaches the surface of the printing ribbon 38 and comes into contact with the arm 32;
A pair of springs 3 are rotatable between a closed position where they are separated from the surface of the printing ribbon 38 and abut against the stopper 27, and are normally hung between the guide main body 24 and the presser member 30.
4 is biased and held in the closed position.

A slit 35 is formed in each of the presser arms 32 along its elongated direction, and the bent pieces 25 of the guide main body 24 are arranged so as to fit into the upper and lower ends of the slits 35, as shown in FIG. ing.

The outer portion of the space 22 divided by the slit 35 of the presser arm 32 bulges away from the surface of the arm 23 and has a bulge 36 having a protrusion 36a projecting outward on the opposite side of the space 22. is forming.

Further, the lower end of the presser member 30 is provided with a hanging portion 2 of the guide main body 24.
A protrusion 37 that hangs downward is formed on the back surface of 8.

This protrusion 37 is inclined so as to move away from the hanging portion 28 as it goes downward.

The printing ribbon 38 is sandwiched between the guide main body 24 and the presser member 30, and is held between the arm 23, the bent piece 25, and the presser arm 32.
a pair of gaps defined by, i.e., ribbon passages 39
The ribbon 38 is passed through each printing operation of the typewriter.
is sent stepwise in the longitudinal direction.

40 is a link connected to a printing mechanism (not shown);
It is pulled to the right in FIG. 2 every time a printing operation is performed.

The left end of this link 40 extends below the ribbon guide 31 and is hooked onto one arm 41a of a one-arm lever 41.

This one-arm lever 41 is rotatably supported by a machine frame (not shown) by a stepped screw 43.

The other arm 41b of the one-arm lever 41 extends along the hanging portion 28 of the guide main body 24, and has a short shaft 44 fixed to its tip.

This short shaft 44 is fitted into the elongated hole 29 of the hanging portion 28.

Therefore, when the link 40 is pulled to the right during a printing operation, the one-arm lever 41 is rotated clockwise around the stepped screw 43 via the pin 42.

At this time, the upward movement of the short axis 44 pushes the guide main body 24 upward through the elongated hole 29, and the ribbon guide 31 moves from its rest position below about the axis 12, so that the ribbon 38 covers the front surface of the printing point. be raised to a certain position.

With the ribbon 38 raised to a predetermined position, the printing element places the printing paper (
(not shown) is stamped, and the desired characters are printed on the printing paper.

45 is a manual operation member rotatably supported on the support plate 10 by a short shaft 46.

This manual operation member 45 is a well-known click stop mechanism 4.
6, it is held in either the inoperative position shown in FIG. 2 or the operating position shown in FIG.

The manual operation member 45 has an arm 45a extending upward, and a shaft member 47 is fixed to the back surface of the intermediate portion of the arm 45a.

This shaft member 47 is connected to the first groove portion 21 of the actuating member 17.
It constitutes the actuating means 48 of the manual operation member 4.
5 is in the inoperative position shown in FIG.
is arranged so as not to come into contact with the groove portion 21.

When the manual operation member 45 is tilted to the operating position shown in FIG.
7, the swing lever 11 is pushed up against the spring 15, the ribbon guide 31 is moved upward to the ribbon exchange position (FIG. 3) above the rest position, and then the shaft member 47 is inserted into the groove 21. Once fitted, the ribbon guide 31 is held in its ribbon exchange position and can be held in that position by the click stop mechanism 46.

A pin 49 is further fixed to the intermediate portion of the arm 45a of the manual operation member 45.

50 is a link whose one end is hooked to the pin 49.

51 is a second rotatably supported on the stepped screw 43.
The link 50 is an actuating lever as an actuating means.
The other end is hooked to a pin 52 fixed on this lever 51.

The actuating arm 51 a of the actuating lever 51 is arranged below the protrusion 37 of the presser member 30 and on the back side of the other arm 41 b of the one-arm lever 41 .

When the manual operating member 45 is in the inoperative position, the actuating arm 51a of the actuating lever 51 is connected to the protrusion 37 of the presser member 30.
It is placed in a position where it cannot come into contact with the

When the manual operating member 45 is moved from the inoperative position shown in FIG. 2 to the operating position shown in FIG.
is rotated clockwise, the actuating arm 51a comes into contact with the protrusion 37 of the presser member 30, and further rotates around the abutting portion between the bent step 26 of the arm 23 and the cutout step 33 of the presser arm 32. The presser member 30 is rotated against the spring 34 in a direction in which its upper part is separated from the surface of the printing ribbon 38, thereby opening the upper part of the ribbon passage 39.

Next, in the latter half of the stroke when the manual operation member 45 moves toward the operating position, the shaft member 47 on the manual operation member 45 moves to the operating member 1.
7, the swinging lever 11 is rotated clockwise about the shaft 12 against the spring 15, and the ribbon guide 31 is rotated clockwise around the shaft 12 against the spring 15. The ribbon is moved upward from the rest position to the upper ribbon exchange position, and then the shaft member 47 is fitted into the groove 21,
Ribbon guide 31 is held in its ribbon exchange position.

At this time, the actuating arm 51a of the actuating lever 51 is the presser member 3.
0, the upper part of the ribbon passage 39 is kept open.

Further, when the first actuating means 48 consisting of the groove portion 21 and the shaft member 47 is actuated, the swinging lever 11 is raised to the middle of its swinging range, so that the manual operation member 45
Even if the ribbon guide 31 is kicked up by the actuating lever 51 without fully opening its ribbon passage 39 when the ribbon guide 31 is forcefully pushed down to the operating position, the swinging lever 11 is regulated by the shaft member 47 and the groove 21 and remains at the predetermined position. is stopped and held.

Therefore, even if the Novon guide 31 moves upward to the ribbon exchange position while the upper part of the ribbon passage 39 is not fully opened,
If the swing lever 11 is held at a predetermined position, the operating lever 5
1 ensures that the ribbon passage 39 is opened and the ribbon 38
It becomes possible to take in and out.

As described in detail above, the ribbon device according to this invention reliably moves the ribbon guide 31 upward to a predetermined ribbon exchange position by simply moving the manual operation member 45 from the inactive position to the active position, and Printing ribbon 38
The ribbon guide can be rotated in a direction away from the surface of the ribbon guide and held at the ribbon exchange position with the upper part of the ribbon passage 39 open. Ribbons can be replaced very easily.

Moreover, when the manual operation member 45 is in the inoperative position, it does not interfere with normal printing operations;
To provide a ribbon device that has a simple structure and can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a front view of main parts showing a conventional example of a ribbon device, Fig. 2 is a front view of main parts showing an embodiment of the present invention, Fig. 3 is an explanatory diagram of operation, and Fig. 4 shows ribbon guide 31 facing upward. FIG. 3 is a perspective view of a main part showing a state in a printing position. In the figure, 11 is a swing lever, 17 is an actuation member, 21 is a groove, 31 is a ribbon guide, 45 is a manual operation member, 47 is a shaft member, 48 is a first actuation means, and 51 is an actuation lever (second
(actuation means).

Claims (1)

[Claims for Utility Model Registration] A guide main body having a pair of vertically extending arms with a space for passing a printing element between them, and an upper part of the guide main body in contact with the surface of the ribbon at the lower part of the guide main body. a pair of presser arms that are pivotally pivoted in a direction away from each other and cooperate with said arms to form a normally open ribbon path; a presser member having a protrusion for opening an upper part of the ribbon passage; a swinging lever that moves up and down each time an operation is performed; a non-operating position that holds the ribbon guide at the rest position during non-printing operations; and a swing lever that moves and holds the ribbon guide from the rest position to a ribbon exchange position above the rest position. a manual operating member rotatably supported between the operating position and the operating position; a groove provided on one of the manual operating member and the swing lever and having a cam portion at an inlet opening; and a shaft member that engages with the manual operation member, and when the manual operation member is moved to the operating position, the shaft member engages with the cam portion and the action of the cam portion pushes the ribbon guide to the ribbon exchange position. , a first actuating means that is fitted in the groove and holds the ribbon guide in the ribbon exchange position; and a first actuating means that is operatively connected to the manual operating member and that is operatively connected to the holding member when moving the manual operating member to the operating position. and a second actuating means for engaging the projection to rotate the upper part of the presser arm about the pivot portion, and for rotating the presser member so as to open the upper part of the ribbon path. Characteristic ribbon device.